##############################################################################
# 
# Copyright (C) Zenoss, Inc. 2007, all rights reserved.
# 
# This content is made available according to terms specified in
# License.zenoss under the directory where your Zenoss product is installed.
# 
##############################################################################


import marshal, re, sys, time

import Globals, Acquisition
import App
import App.Management
import AccessControl
import AccessControl.Role, AccessControl.Owned, App.Common
from ExtensionClass import Base
from ComputedAttribute import ComputedAttribute
from AccessControl import getSecurityManager, Unauthorized
from AccessControl.ZopeSecurityPolicy import getRoles
from Acquisition import aq_base, aq_parent, aq_inner
from DocumentTemplate.html_quote import html_quote
from DocumentTemplate.ustr import ustr
from zExceptions.ExceptionFormatter import format_exception
from zExceptions import Redirect

from OFS.CopySupport import CopySource
from OFS.Traversable import Traversable

from Products.ZenUtils.Utils import unused


HTML=Globals.HTML

import logging
logger = logging.getLogger()

class ZItem(Base, CopySource, App.Management.Tabs, Traversable,
           AccessControl.Owned.Owned,
           ):


    """A common base class for simple, non-container objects."""

    isPrincipiaFolderish=0
    isTopLevelPrincipiaApplicationObject=0

    # Direct use of the 'id' attribute is deprecated - use getId()
    id=''

    getId__roles__=None
    def getId(self):
        """Return the id of the object as a string.

        This method should be used in preference to accessing an id attribute
        of an object directly. The getId method is public.
        """
        name=getattr(self, 'id', None)
        if callable(name):
            return name()
        if name is not None:
            return name
        if hasattr(self, '__name__'):
            return self.__name__
        raise AttributeError, 'This object has no id'

    # Alias id to __name__, which will make tracebacks a good bit nicer:
    __name__=ComputedAttribute(lambda self: self.getId())

    # Name, relative to SOFTWARE_URL of icon used to display item
    # in folder listings.
    icon=''

    # Meta type used for selecting all objects of a given type.
    meta_type='simple item'

    # Default title.
    title=''

    # Default propertysheet info:
    __propsets__=()

    manage_options=(
        AccessControl.Owned.Owned.manage_options
        )

    # Attributes that must be acquired
    REQUEST=Acquisition.Acquired

    # Allow (reluctantly) access to unprotected attributes
    __allow_access_to_unprotected_subobjects__=1

    def title_or_id(self):
        """Return the title if it is not blank and the id otherwise.
        """
        title=self.title
        if callable(title):
            title=title()
        if title: return title
        return self.getId()

    def titleOrId(self):
        """Return the title if it is not blank and the id otherwise
        """
        return self.title_or_id()

    def title_and_id(self):
        """Return the title if it is not blank and the id otherwise.

        If the title is not blank, then the id is included in parens.
        """
        title=self.title
        if callable(title):
            title=title()
        id = self.getId()
        return title and ("%s (%s)" % (title,id)) or id

    def this(self):
        # Handy way to talk to ourselves in document templates.
        return self

    def tpURL(self):
        # My URL as used by tree tag
        return self.getId()

    def tpValues(self):
        # My sub-objects as used by the tree tag
        return ()

    _manage_editedDialog=Globals.DTMLFile('dtml/editedDialog', globals())
    def manage_editedDialog(self, REQUEST, **args):
        return apply(self._manage_editedDialog,(self, REQUEST), args)

    """
    def raise_standardErrorMessage(
        self, client=None, REQUEST={},
        error_type=None, error_value=None, tb=None,
        error_tb=None, error_message='',
        tagSearch=re.compile(r'[a-zA-Z]>').search,
        error_log_url=''):

        try:
            if error_type  is None: error_type =sys.exc_info()[0]
            if error_value is None: error_value=sys.exc_info()[1]

            # allow for a few different traceback options
            if tb is None and error_tb is None:
                tb=sys.exc_info()[2]
            if type(tb) is not type('') and (error_tb is None):
                error_tb = pretty_tb(error_type, error_value, tb)
            elif type(tb) is type('') and not error_tb:
                error_tb = tb

            # turn error_type into a string
            if hasattr(error_type, '__name__'):
                error_type=error_type.__name__

            if hasattr(self, '_v_eek'):
                # Stop if there is recursion.
                raise error_type, error_value, tb
            self._v_eek=1

            if str(error_type).lower() in ('redirect',):
                raise error_type, error_value, tb

            if not error_message:
                try:
                    s = ustr(error_value)
                except:
                    s = error_value
                try:
                    match = tagSearch(s)
                except TypeError:
                    match = None
                if match is not None:
                    error_message=error_value

            if client is None: client=self
            if not REQUEST: REQUEST=self.aq_acquire('REQUEST')

            try:
                if hasattr(client, 'standard_error_message'):
                    s=client.standard_error_message
                else:
                    client = client.aq_parent
                    s=client.standard_error_message
                kwargs = {'error_type': error_type,
                          'error_value': error_value,
                          'error_tb': error_tb,
                          'error_traceback': error_tb,
                          'error_message': error_message,
                          'error_log_url': error_log_url}

                if getattr(aq_base(s),'isDocTemp',0):
                    v = s(client, REQUEST, **kwargs)
                elif callable(s):
                    v = s(**kwargs)
                else:
                    __pychecker__='self="s"'
                    v = HTML.__call__(s, client, REQUEST, **kwargs)
            except:
                logger.error(
                    'Exception while rendering an error message',
                    exc_info=True
                    )
                try:
                    strv = str(error_value)
                except:
                    strv = ('<unprintable %s object>' % 
                            str(type(error_value).__name__))
                v = strv + (
                    (" (Also, the following error occurred while attempting "
                     "to render the standard error message, please see the "
                     "event log for full details: %s)")%(
                    html_quote(sys.exc_info()[1]),
                    ))
            raise error_type, v, tb
        finally:
            if hasattr(self, '_v_eek'): del self._v_eek
            tb=None
    """

    def manage(self, URL1):
        """
        """
        raise Redirect, "%s/manage_main" % URL1

    # This keeps simple items from acquiring their parents
    # objectValues, etc., when used in simple tree tags.
    def objectValues(self, spec=None):
        unused(spec)
        return ()
    objectIds=objectItems=objectValues

    # FTP support methods

    def manage_FTPstat(self,REQUEST):
        """Psuedo stat, used by FTP for directory listings.
        """
        from AccessControl.User import nobody
        mode=0100000

        if (hasattr(aq_base(self),'manage_FTPget')):
            try:
                if getSecurityManager().validate(
                    None, self, 'manage_FTPget', self.manage_FTPget):
                    mode=mode | 0440
            except Unauthorized:
                pass

            if nobody.allowed(
                self.manage_FTPget,
                getRoles(self, 'manage_FTPget', self.manage_FTPget, ()),
                ):
                mode=mode | 0004

        # check write permissions
        if hasattr(aq_base(self),'PUT'):
            try:
                if getSecurityManager().validate(None, self, 'PUT', self.PUT):
                    mode=mode | 0220
            except Unauthorized:
                pass

            if nobody.allowed(
                self.PUT,
                getRoles(self, 'PUT', self.PUT, ()),
                ):
                mode=mode | 0002

        # get size
        if hasattr(aq_base(self), 'get_size'):
            size=self.get_size()
        elif hasattr(aq_base(self),'manage_FTPget'):
            size=len(self.manage_FTPget())
        else:
            size=0
        # get modification time
        if hasattr(aq_base(self), 'bobobase_modification_time'):
            mtime=self.bobobase_modification_time().timeTime()
        else:
            mtime=time.time()
        # get owner and group
        owner=group='Zope'
        if hasattr(aq_base(self), 'get_local_roles'):
            for user, roles in self.get_local_roles():
                if 'Owner' in roles:
                    owner=user
                    break
        return marshal.dumps((mode,0,0,1,owner,group,size,mtime,mtime,mtime))

    def manage_FTPlist(self,REQUEST):
        """Directory listing for FTP.

        In the case of non-Foldoid objects, the listing should contain one
        object, the object itself.
        """
        # check to see if we are being acquiring or not
        ob=self
        while 1:
            if App.Common.is_acquired(ob):
                raise ValueError('FTP List not supported on acquired objects')
            if not hasattr(ob,'aq_parent'):
                break
            ob=ob.aq_parent

        stat=marshal.loads(self.manage_FTPstat(REQUEST))
        id = self.getId()
        return marshal.dumps((id,stat))

    def __len__(self):
        return 1

    def __repr__(self):
        """Show the physical path of the object and its context if available.
        """
        try:
            path = '/'.join(self.getPhysicalPath())
        except:
            return Base.__repr__(self)
        context_path = None
        context = aq_parent(self)
        container = aq_parent(aq_inner(self))
        if aq_base(context) is not aq_base(container):
            try:
                context_path = '/'.join(context.getPhysicalPath())
            except:
                context_path = None
        res = '<%s' % self.__class__.__name__
        res += ' at %s' % path
        if context_path:
            res += ' used for %s' % context_path
        res += '>'
        return res

def pretty_tb(t, v, tb, as_html=1):
    tb = format_exception(t, v, tb, as_html=as_html)
    tb = '\n'.join(tb)
    return tb

#from OFS.SimpleItem import SimpleItem
#ZItem = SimpleItem
